<template>
  <div>
    <div class="mui-numbox" data-numbox-min="0">
      <button class="mui-btn mui-btn-numbox-minus" type="button">-</button>
      <input class="mui-input-numbox" type="number" value="0" @change="countChanged" ref="numbox" />
      <button class="mui-btn mui-btn-numbox-plus" type="button">+</button>
    </div>
  </div>
</template>

<script>
import mui from '../../lib/mui/js/mui.min.js'
export default {
  mounted() {
    // console.log(this.max);
    mui.init();
    mui(".mui-numbox").numbox();
  },
  methods: {
    countChanged() {
      //每当文本框数据被修改时,把数据通过事件调用传递给父组件
      // console.log(this.$refs.numbox.value);
      this.$emit("getCount", parseInt(this.$refs.numbox.value));
    }
  },
  props: ["max"],
  watch: {
    // 属性监听
    'max': function(newVal, oldVal) {
      mui(".mui-numbox")
        .numbox()
        .setOption('max', newVal);
    }
  }
};
</script>


<style lang="scss" scoped>
div {
  display: inline-block;
}
</style>